Mazda 323 1988 Workshop Manual page 260

4A
CONTROLSYSTEM
ENGINE CONTROL UNIT
Englne Signal Monitor (49 9200 162) and Adapter (49 9200 163)
Adapter
harness m
elector switch
m ATermin
Engine wiring harness\
/ -
Engine signal monitor
Monitor Switch
Control unit
terminal number
ials
The Engine Signal Monitor (49 9200 162) was developed to check the engine control unit terminal
voltages. This monitor easily inspects the terminal voltage by setting the monitor switch.
How to Use the Engine Signal Monitor
1. Connect the Englne Signal Monitor
(49 9200 162) between the engine control unit and the en-
gine harness using the adapter harness (49 9200 163).
2. Turn
the selector switch and monitor switch to select the terminal number.
3. Check the terminal voltage.
Do not apply voltage to terminals.
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4A-60
323 Revised 10187